Question

Aflati masurile unghiurilor unu paralelogram AVCD, stiind ca: a) m(<A)=3x - 15 si m(<D)=2x+35 b)m(<A)=5x-49 si m(<C)=3x+21

Answer 1

a) stim ca m(<A)+m(<D)= 180 grade
3x-15+2x+35=180
5x=160
x=32
deci m(<A)=m(<C)=3*32-15=96-15=81
si m(<B)=m(<D)=2*32+35=64+35=99

b) m(<A)=m(<C)
5x-49=3x+21
2x=70
x=35
deci m(<A)=m(<C)=3*35+21=105+21=126
m(<B)=m(<D)=180-126=154

O zi buna!